Aikido – From Japan: a martial art developed by Morihei Ueshiba (often referred to by his title 'O Sensei' or 'Great Teacher'). On a purely physical level it is an art involving some throws and joint locks that are derived from Jujitsu and some throws and other techniques derived from Kenjutsu. Aikido focuses not on punching or kicking opponents, but rather on using their own energy to gain control of them or to throw them away from you. It is not a static art, but places great emphasis on motion and the dynamics of movement.
On the technical side, aikido is rooted in several styles of jujitsu (from which modern judo is also derived), in particular daitoryu-(aiki) jujitsu, as well as sword and spear fighting arts. Oversimplifying somewhat, we may say that aikido takes the joint locks and throws from jujitsu and combines them with the body movements of sword and spear fighting. However, we must also realize that many aikido techniques are the result of Master Ueshiba's own innovation.
In aikido, as in virtually all Japanese martial arts, there are both physical and mental aspects of training. The physical training in aikido is diverse, covering both general physical fitness and conditioning, as well as specific techniques. Because a substantial portion of any aikido curriculum consists of throws, the first thing most students learn is how to safely fall or roll. The specific techniques for attack include both strikes and grabs; the techniques for defense consist of throws and pins. After basic techniques are learned, students study freestyle defense against multiple opponents, and techniques with weapons.
Physical training goals pursued in conjunction with aikido include controlled relaxation, flexibility, and endurance, with less emphasis on strength training. In aikido, pushing or extending movements are much more common than pulling or contracting movements. This distinction can be applied to general fitness goals for the aikido practitioner. In aikido, specific muscles or muscle groups are not isolated and worked to improve tone, mass, and power. Aikido-related training emphasizes the use of coordinated whole-body movement and balance similar to yoga or pilates. For example, many dojos begin each class with warm-up exercises, which may include stretching and ukemi (break falls).
Aikido training is based primarily on two partners practicing pre-arranged forms (kata) rather than freestyle practice. The basic pattern is for the receiver of the technique (uke) to initiate an attack against the person who applies the technique—the tori, or shite (depending on aikido style), also referred to as nage (when applying a throwing technique), who neutralises this attack with an aikido technique.
Both halves of the technique, that of uke and that of nage, are considered essential to aikido training. Both are studying aikido principles of blending and adaptation. Nage learns to blend with and control attacking energy, while uke learns to become calm and flexible in the disadvantageous, off-balance positions in which nage places them. This "receiving" of the technique is called ukemi. Uke continuously seeks to regain balance and cover vulnerabilities (e.g., an exposed side), while nage uses position and timing to keep uke off-balance and vulnerable. In more advanced training, uke will sometimes apply reversal techniques to regain balance and pin or throw nage.
Ukemi refers to the act of receiving a technique. Good ukemi involves attention to the technique, the partner and the immediate environment—it is an active rather than a passive receiving of aikido. The fall itself is part of aikido, and is a way for the practitioner to receive, safely, what would otherwise be a devastating strike or throw.
Aikido techniques are usually a defense against an attack; therefore, to practice aikido with their partner, students must learn to deliver various types of attacks. Although attacks are not studied as thoroughly as in striking-based arts, "honest" attacks (a strong strike or an immobilizing grab) are needed to study correct and effective application of technique. Many of the strikes of aikido resemble cuts from a sword or other grasped object, which indicates its origins in techniques intended for armed combat. Other techniques, which appear to explicitly be punches (tsuki), are practiced as thrusts with a knife or sword. Kicks are generally reserved for upper-level variations; reasons cited include that falls from kicks are especially dangerous, and that kicks (high kicks in particular) were uncommon during the types of combat prevalent in feudal Japan.
Here are a couple short videos from youtube showing Aikido demonstrations
Please refer to our references as we have used a few different sources for the basic explanation of each martial art discipline. Many of our direct links, images and text will be from the site Wikipedia which is not known for the most accurate information when it comes to doing a thesis or studying for ones P.H.D. but does have a large collection of data that is well organized. Much of the text regarding martial arts styles on Wikipedia seems to generally sum up each discipline as good as many other sources. We do not intend to re-invent the wheel, but we do want to roll you in a good direction in order to get a glimpse of each style.